Americans consumed an estimated 2,538 calories per person per day in 2010, up from 2,064 calories in 1970. Grains (mainly refined grains) and added fats and oils contributed 424 calories to this 474-calorie increase. Dairy products were the only food group that contributed fewer calories in 2010. In 1970, the meat, eggs, and nuts group provided more daily calories than any other food group.
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